'Failed to load' problem

Hi. I’m getting this error message when I try to load the Preview screen of my website, so I can’t actually see the preview of the work I’ve done in Code. Can anyone advise what it means and how to resolve it? Thanks in advance.

Hi,
In order for us to successfully review this matter further and properly assist you, please send us a video of the issue using screencast . Simply recreate the issue while recording the steps. Add the screencast.com URL to your response. Moreover, please send us the editor URL so that we can check it on our end.

Thanks,
Tal.